Tractor hoist



R. B. MOORE May 5, 1931.

TRACTOR HOIST Filed July 2, 1927 4 Sheets-$heet 1 INVENTOR May 5, 1931. R. B. MOORE 1,803,400

\ TRACTOR HOIST Filed July 2, ,1927 4 SheetsSheet 2 llllllllllllllllllll "Iii Pllllflllllllllllh llll /NEY May 5, 1931. R. B. MOORE 1,303,400

TRACTOR HOIST Filed July 2, 1927 4 Sheets-Sheet 3 INVENTOR R. B. MOORE TRACTOR HOIST Filed July 2, 1927 4 Sheets-Sheet 4 INVENTOR fia/ re.

AT RNEY Patented May 5, 1931 STATES RALPH B. MOORE, F PORTLAND, OREGON TRACTOR HOIST Application filed July 2, 1927. Serial no. 205,163.

The object of my invention is to provide a novel piece of hoisting or drawing machinery which is quite mobile and which has suficient power and speed to be effectively '8' used in logging and construction operations.

The standard manner of drawing logs from where they are felled to a central loading station is by means of a logging engine or by animal or mechanical tractive equipment. Logging engines are either mounted upon tracks or upon sleds and are necessarily quite cumbersome and expensive and thus adapted to be used only where large stands of timber are to be logged.

On the other hand, the useof tractive equipment is limited by the contour of the logged land and by the time required to traverse the distance between the points of haul.

A large number of isolated stands of timber of limited footage can not be logged economically at the present time by the use of present equipment, and it is the object of my invention to provide power devices to fill this need. Similar conditions are met in construction work at the present time on jobs too large for manual labor and too small or too isolated to use mechanical digger equipment.

I attain this object by mounting upon the rear frame ends of a tractor, preferably of the track-laying type, a two-drum two-speed hoist and connect the operating mechanism therefor to the rearwardly extending power shaft provided for the auxiliary equipment of said tractor. Such shaft is housed and an opening is provided in said housing which is alined with said shaft, said opening being provided with cover retaining means, and such hoist preferably also is fastened to the tractor through such. means.

This type of tractor is usually made front heavy so that when a load is being pulled it will not tend to lift the front end of the tractor from the ground, and the operators position is arranged at the rearo the tractor with the operating controls arranged conveniently about said position.

A further object of my invention is to provide a hoist which is of such weight and is so positioned that it will tend to counteract the front heavy end of the tractor and to equalize the Weight between .the two ends to obtain unlform traction, and which hoist is of such size and is so positioned that the operator can view the work being done and can operate the hoist conveniently from his position on the tractor. I

A further object of my invention is to mount the hoist at the rear of the tractor in such a manner that it can be operated convenlently, supported securely, and so that the loads imposed thereby upon the tractor can be efliciently resisted.

The details of my invention are hereinafter described in greater detail with reference to the accompanying drawings, in which:

Fig. 1 is a side elevation of a tractor with my improved hoist mounted at the rear end thereof, the hoist being shown in full lines and the remainder of the truck being shown in dotted outline;

Fig. 2 is a fragmentary plan view of the rear end of such tractor with the hoist mounted in place, the rear frame ends'and the hoist being shown in full lines and the remainder of the tractor being shown in dotted outline;

Fig. 3 is a fragmenatry perspective view of one type of tractor to which my. hoist has been. applied, this view showing the rear frame ends, housing and the end of the power take-ofi shaft in full lines, and the re mainder in dotted outline;

Fig. 4 is a perspective view of the frame element of the type of tractor shown in Fig.-

Fig. 5 is a view similar to Fig. 3 of a modified type of tractor having similar elements and adapted to have my improved hoist mounted thereon;

Fig. 6 is a perspective view of the hoist portion that constitutes-a partial housing and supporting element for my improved hoist with the tractor; and

Fig. 7 is a perspective of, my improved hoist shown mounted at the rear of a tractor, the latter being shown in dotted outline.

My improved power unit preferably utilizes a tractor a of the track laying type as is shown in the drawings in which the con trols such'as the steering element a, and the like, are grouped at the rear end and adjacent the drivers seat (12. The front portion of such tractor is substantially higherthan the rear portion so that any appliance or auxiliary device mounted at the front end of such tractor can be viewed from the drivers seat only with eat difliculty. Such tractors are uniforms the draw bar pull will not lift the front end of the tractor from the ground.

My improved hoist b is mounted at the rear of such tractor and is of such size and weight as will approximately counterbalance the front heavy end of the tractor to distribute the weight of the whole evenly upon the treads a3 of the tractor. Such hoist is preferably of such height that it lies below the horizontal plane of the drivers seat a2 and that of the controls adjacent thereto and above the plane occupied by the draft connections a4. This is for the reason that the operator of the tractor can turn about in his seat and operate the hoist and can easily look over the top of the hoist and view the work being operated upon. Being above the draft connections a4, permits the hoist to be used without interference by the draft connections and ermits the latter to be used without interf drence by the hoist. That is, mounting the hoist in this manner permits the tractive power and tractive connections of the tractor to be utilized without restraint and at the same time permits the hoist to be used efliciently.

In tractors of this character, a frame member a5 extends the full length of the tractor and is the main supportin member for the body of the tractor upon t e pivoted tracks a3 and their supports. The ends of such frame member a5 extend rearwardly from the tractor, one at each side, and it is to such ends that the draft connections a4 are usually fastened. Such frame member a5 comprises two side members which are spaced apart and it is upon these two spaced ends that my improved hoist is supported, in the main.

Above such ends of the frame member a5 and also extendin rearwardly is the stub end of a power t e-ofi shaft (16, such and usually bein concealed within the transmission housing a7 and alined with an aperture in the latter. A removable plate is provided to cover such aperture and bolts or studs a8 are arranged the latter to hold such plate in place. I remove such plate and use the bolts or studs provided, to fasten my hoist to the transmission housing. The stub end of the power take-ofi shaft a6 is arranged substantially in the middle of the transmission housing and above the frame ends and thus the three supporting members for the hoist are arranged approximately in an equilateral triangle and thus constitute a three point support for the hoist.

y made front heavy so that In Fig. 5 I show a modified type of tractor c in WhlCh the frame ends 0 and cover suporting means 02 are also arranged in the orm of a triangle, and in addition other openings arearranged at each side of said supporting means 02 and means 03 and 04 are arranged about such openings. In this type of tractor I preferably utilize such latter means also to fasten the hoist to such tractor. In this figure I also show the stub end of the power take-off shaft 05 and it is to be understood that the operating portions of the hoist are adapted to be fastened to such shaft similarly to the manner, which will hereinafter be described, used to connect the operating elements of the hoist to the shaft a6.

As is shown most clearly in Figs. 1, 2-

and 7, the tracks a3 extend a substantial distance rearwardly of the transmission housing (17 and such tracks thus protect the hoist mounted between the same and bolted to the transmission housing.

The hoist is driven by the power take-off shaft a6 which is connected to the power shaft d of the hoist by a coupling e. A combined housing and supporting member 7 is fastened to the transmission housing a7 by the bolts of studs a8, and is provided with two feet f which are fastened to the ends of the frame a5 by bolts 9. Formed upon the back of the housing is a bearing 2 for the shaft d, such bearing being aline with the power take-off shaft a6. Twoside pieces in and z' are fastened to the housing and supporting member f, and are spaced apart and carry the drums j and is of the hoist between t cm.

A transverse shaft Z is journaled in such parts and carries a bevel gear m which' 'to serve as a trip drum and the drum is as the main drum of the hoist.

Clutches, controlled by levers 1' and a for the drums j and k respectively, control the a plication of power to the drums and a lever 0 adjacent the drivers seat (12 on the tractor controls the transmission 0. A brake for the drums is controlled by a lever t.

My improved hoist mounted upon the rear end of a tractor in the manner described, provides a power unit adapted to be used in logging operations as a very portable and sturdy engine. In construction operations such unit can be connected to a drag line bucket and will serve as a very efiicient digging machine. Such piece of .power equipment thus provided, because of its portability, is able to get into tight places and do quite heavy work,.where the: cost of putting heavier machines would make the operation prohibitive.

Two speeds permits the work to be done speedily or powerfully and two drums permit a main line and a trip line to be spooled. An operator is able to roll up his cable on the drums in a few minutes and start for another job. Thepower unit is capable of moving twenty to forty miles in a day on a'road and upon arriving at another job, in the same few minutes that it took to roll up the cable, it is ready to go to WOIk. All adjusting of the drums for squaring around for line pulls is done from the drivers seat in a few seconds and the necessity for providing fairleads is eliminated. The use of the tractor as a draft unit is not hampered in the slightest by the mounting of the hoist in the manner described because of the location of the parts relatively to each other.

I claim:

1 In combination with a tractor having two spaced rearwardly extending frame members, a longitudinally-arranged horizontal power take-ofi' shaft terminating at the rearward end of such tractor and arranged above' the horizontal plane of such frame ends, such shaft being alined with an aperture in the body of the tractor, cover fastening means arranged adjacent such aperture, a draft connection arranged at the rearward edge of such tractor and below the horizontal plane of such frame ends, an auxiliary hoist of the character described mounted upon the rearward end of such tractor, fastened to the latter by such fastening means adjacent the power take-off shaft aperture and to such frame ends, such hoist being arranged above such frame ends the latter supporting the major portion of such hoist and such hoist being arranged above and clear of such draft connections so as not to interfere with the operation of the latter.

2. In combination with a tractor having two spaced rearwardly extending frame members, a longitudinally-arranged horizontal power take-0E shaft terminating at the rearward end of such tractor and arranged above the horizontal plane of such frame ends and laterally intermediate such frame ends, such shaft being alined with an aperture in the body of the tractor, cover fastening means arranged adjacent such aperture, a draft connection arranged at the rearward edge of such tractor and below the horizontal plane of such frame ends, an auxiliary hoist of the character described mounted upon the rearward end of such tractor, fastened to the latter by such fastening means adjacent the power take-ofl shaft aperture and to such frame ends, such hoist being arranged above such frame ends t he latter supporting the major portion of such hoist and such hoist being arranged above and clear of such draft connect-ions so as not to interfere with the operation of the latter.

3. In comination with a tractor provided with an operating station arranged at the rearward end thereof and operating controls grouped immediately forward of such station an auxiliary hoist of the character described mounted upon the rearward end of such tractor and operating controls for such auxiliary described mounted upon the rearward end of such tractor, operating controls for such auxiliary hoist being arranged in grouped relation rearwardly of such operating station and operable from the latter, such hoist comprising a frame closed at the top thereof, such top thus constituting an operating platform for such hoist.

5. In combination with a tractor having two I spaced rearwardly extending frame members, a longitudinally-arranged horizontal power take-off shaft terminating at the rearward end of such tractor and arranged above the horizontal plane of such frame ends, such shaft being alined with an aperture in the body of the-tractor, cover fastening means arranged adjacent such aperture, an auxiliary hoist of the character described mounted upon the rearward end of such tractor fastened to the latter by such fastening means adjacent the power takeoff shaft aperture and to such frame ends, such hoist being arranged above such frame ends the latter supporting the major portion of such hoist, such hoist comprising a frame and a longitudinally-arranged operating stub shaft alined and loosely coupled to such power take-off shaft extending thru and being journalled in the end of such frame.

6; In combination with a tractor having two spaced rearwardly extending frame members, a longitudinally-arranged horizontal power take-off shaft terminating at the rearward end of such tractor and arranged above the horizontal plane of such frame ends, such shaft being alined with an aperture in the body of the tractor, cover fastening means arranged adjacent such aperture, an auxiliary hoist-of the character described mounted upon the rearward end of such tractor fastened to the latter by suchfastening means adjacent the power take-olf shaft aperture and to such frame ends, such hoist being arranged above such frame ends at the end facin rearwardly and away from the connection etween such hoist and the tractor and a longitudinally-arranged operating stub shaft alined and loosely coupled to such power take-off shaft extending thru the end of such frame element facing the tractor. 1

7. In combination with a tractor having two spaced rearwardly extending frame members, a longitudinally-arranged horizontal power take-ofi' shaft terminating at the rearward end of such tractor and arranged above the horizontal plane of such frame ends, such shaft being alined with an aperture *in the body of the tractor, cover fastening means arranged adjacent such aperture, an auxiliary hoist of the character described mounted upon the rearward end of such tractor fastened to the latter by such fastening means adjacent the ower take-off shaft aperture and to such f fame ends, such hoist being arranged above such frame ends the latter supporting the major portion of such hoist, such hoist comprising a frame and a longitudinally-arranged operating stubshaft alined andloosely coupled to such ower take-off shaft extending thru the end 0 such frame element facing the tractor, such frame element further provided at the bottom thereof with two flanged feet fastened to such rear- Wardly-extending frame ends.

8. In combination with a tractor having two spaced rearwardly extending frame members, a longitudinally-arranged horizontal power take-off shaft terminating at the rearward end of such tractor and arranged above the horizontal plane of such frame.

ends, such shaft being alined with an aperture in the body of the tractor, cover fastening means arranged adjacent such aperture, an auxiliary hoist of the character described mounted upon the rearward end of such tractor fastened to the latter by such fastening means adjacent the power take-01f shaft aperture and to such frame ends, such hoist being arranged above such frame ends the latter supporting the major portion of such hoist, such hoist comprising a frame and a longitudinally-arranged operating stub shaft alined and loosely coupled to such power take-01f shaft extending thru the end of such frame element facing the tractor, such frame element further provided at the bottom thereof with two flanged feet fastened to such rearwardly-extending frame ends and two spaced frame ends extending rearwardly in spaced relation from such frame element and carrying between them the hoist drums, and driving mechanism for such hoist.

RALPH B. MOORE. 

